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The Electro Harmonix Frequency Analyzer Ring Modulator Pedal allows you to create wild ring-modulator based sounds with a much greater degree of fine control.
It gives you two extra notes on top of what you are playing, and can be tuned to a basic frequency over which the new notes are modulated. With a wide 5 octave range and blend control, along with a direct dry-signal output, the Frequency Analyzer gives you plenty of scope to create weird and wacky sounds that could just be the inspiration for your next hit-song.
It offers the potential to sound either very musical or completely atonal, and has so many possibilities that you will still be discovering new applications for it after months, or even years.